LDAP Clients May Not Obtain Service Principle Names from MIT KDC

Article translations Article translations
Article ID: 281401 - View products that this article applies to.
This article was previously published under Q281401
This article has been archived. It is offered "as is" and will no longer be updated.
Expand all | Collapse all


Microsoft Lightweight Directory Access Protocol (LDAP) clients may not retrieve service principle names (SPNs) from an MIT Kerberos server.


When the LDAP client makes a call for an SPN, it uses "LDAP" (in uppercase letters) instead of "ldap" (in lowercase letters). Request for Comments (RFC) 1510 defines only lowercase usage. MIT Kerberos servers that are RFC 1510-compliant are case sensitive. Therefore, requests for an SPN may not work to an MIT Kerberos server.


To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
The English version of this fix should have the following file attributes or later:
   Date      Time      Version        Size     File name
   12/12/00  10:14pm   5.0.2195.2797  123,664  Wldap32.dll


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.


For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:
249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes


Article ID: 281401 - Last Review: October 21, 2013 - Revision: 3.3
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
kbnosurvey kbarchive kbhotfixserver kbqfe kbbug kbfix kbwin2000presp2fix KB281401

Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from smallbusiness.support.microsoft.com